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Die of bending die

A technology of concave die and bending die, which is applied in the direction of metal processing equipment, forming tools, manufacturing tools, etc., can solve the problems of parts failure, easy cracking, breaking, etc., and achieve the goal of improving wear marks or scratches and improving production quality Effect

Inactive Publication Date: 2012-07-11
SUZHOU UNIVERSAL GRP TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During use, the bent part of the part is the stressed area. If there are indentations or scratches on the surface, it is easy to crack or even break after frequent stress, which will cause the failure of the part and affect the production

Method used

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  • Die of bending die
  • Die of bending die
  • Die of bending die

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Embodiment Construction

[0012] The present invention will be described below with reference to the drawings.

[0013] As attached figure 1 The concave mold of a bending die according to the present invention shown in the present invention includes a mold body 1, a groove 2 is opened on the mold body 1, and the lower surface of the groove 2 is formed by an arc I3, an arc II4 and The arc III5 is connected; the arc I3 is tangent to the arc II4; the arc II4 is tangent to the arc III5; the radius of the arc I3 is equal to the radius of the arc III5.

[0014] As attached figure 2 The radius R2 of the arc II is equal to the radius required on the outside of the part 6, the central angle α is equal to the bending angle required by the part 6, and the width K of the groove 2 is less than The length L of part 6. When designing, first determine the distance H from the center of a radius R2 to the top surface, and then according to the formula K=2*tan(α / 2) *(R2*COS(α / 2)+H) / (1- COS(α / 2)) Calculate the width K of ...

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Abstract

The invention discloses a die of a bending die, which comprises a die body. A groove is arranged on the die body, the lower surface of the groove is formed by connecting an arc I, an arc II and an arc III, the arc I is tangent with the arc II, the arc II is tangent with the arc III, and the radius of the arc I is equal to the radius of the arc II. Due to the fact that the lower surface of the groove is formed by connecting the arc I, the arc II and the arc III, the arc I is tangent with the arc II, and the arc II is tangent with the arc III, normal straight line transition is changed into arc smooth transition, so in bending, a part is contacted with the die, a pressed point of the part slides along the arc I and the arc II so as to disperse pressed lines, accordingly abrasion creasing or scratches on the surface of the part are greatly improved, the part cannot crack or even be broken after frequent stress, and production quality is improved.

Description

Technical field [0001] The invention relates to a concave mold, in particular a concave mold for a bending mold, and belongs to the technical field of molds. Background technique [0002] At present, the bent parts produced by many domestic enterprises, especially the parts bent at a large angle, have obvious indentations or scratches on the surface. This is because of the conventional design of the bending die and the cavity, most of the cavities adopt circular arc-straight line-circular arc-straight line-circular arc or circular arc-straight line- ---Transition groove----straight line----arc structure, where the straight line matches the bending angle of the part. When bending, the part and the die are in contact with friction and move, which will form indentations or scratches on the surface of the part. During use, the bending part of the part is the stressed area. If there are indentations or scratches on its surface, it will easily crack or even break after frequent stres...

Claims

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Application Information

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IPC IPC(8): B21D37/10
Inventor 黄伟达
Owner SUZHOU UNIVERSAL GRP TECH CO LTD